jczinn said:actually, I am fairly certain its a Sanderling. Its very difficult to tell these small shorebirds apart, especially when there's no other point of reference as to size etc. But, the shorter, straight bill looks more like Sanderling to me as well as the proximity to the waterline. Sanderlings tend to run along the waves probing in the sand just ahead of the surf. Western and Semipalmated sandpipers are more likely to be found on mud flats or along bay waters than along surf.
Nice shots either way, these guys don't usually stand still!